N4 (nuclear reactor)
The type N4 nuclear reactor is a water-cooled and light water moderated pressurized water reactor of the 3rd generation developed by the former French company Framatome . It has a thermal output of 4250 MW th , an electrical output of 1450 MW e net and thus an efficiency of 34.1%.
Projected data
The reactor has 205 fuel assemblies with 264 fuel rods each. The fuel is slightly enriched uranium oxide (UO 2 ) with a total weight of 110,000 kg. The reactor core has a diameter of 3.48 m and a height of 4.27 m. The reactor pressure vessel has a wall thickness of 230 mm, is 13.65 m high and has a diameter of 4.65 m. The cooling circuit is a 4-loop design (therefore N 4 ). To prevent vapor bubbles in the cooling circuit, the pressure in the primary cooling system is 155 bar . The four primary heat exchangers are located in the reactor pressure vessel for safety reasons. The live steam generated is fed into Alstom's 1500 MW Arabelle turbine at a pressure of 71 bar at 268.8 ° C.
The projected service life is 40 years.
Plants with N4 reactors
There are only four operating plants of this type; two blocks each in Civaux (blocks 1 and 2) and in Chooz (blocks B1 and B2). The owner of these systems is the French utility company EDF . From their commissioning in the 1990s, the four plants were considered to be the most powerful in the world in terms of electrical output until they were overtaken by the commissioning of the EPR at the Taishan nuclear power plant .
Overview
Reactor block | Reactor type | net power |
gross power |
start of building | Network synchronization |
Commercialization of essential operation |
switching off processing |
---|---|---|---|---|---|---|---|
Chooz-B1 | Pressurized water reactor | 1500 MW | 1560 MW | 01/01/1984 | 08/30/1996 | 05/15/2000 | |
Chooz-B2 | Pressurized water reactor | 1500 MW | 1560 MW | December 31, 1985 | 04/10/1997 | 09/29/2000 | |
Civaux-1 | Pressurized water reactor | 1495 MW | 1561 MW | October 15, 1988 | 12/24/1997 | 01/29/2002 | (Planned for 2037) |
Civaux-2 | Pressurized water reactor | 1495 MW | 1561 MW | 04/01/1991 | 12/24/1999 | 04/23/2002 | (Planned for 2039) |
See also
Web links
- Nuclear power plants in the world. In: Nuclear Forum Switzerland. Accessed January 1, 2020 .
- All nuclear power plants in the world. (PDF; 2 MB) In: IAEA: Power Reactor Information System (PRIS). Retrieved January 1, 2020 .
Individual evidence
- ↑ a b Institute for Safety and Risk Sciences, University of Natural Resources and Life Sciences, Vienna: Description of the power plant type N4. 2008, archived from the original on April 20, 2013 ; accessed on January 1, 2020 .
- ↑ Operating data for Block Chooz B1. In: IAEA - PRIS. Retrieved January 1, 2020 .
- ↑ Operating data from Block Chooz B2. In: IAEA - PRIS. Retrieved January 1, 2020 .
- ↑ Operating data for Block Civeaux-1. In: IAEA - PRIS. Retrieved January 1, 2020 .
- ↑ Operating data for Block Civeaux-2. In: IAEA - PRIS. Retrieved January 1, 2020 .